Filter



FIG. 1 is a perspective view obliquely from the rear of an embodiment of a filter, showing my new design;

FIG. 2 is a perspective view obliquely from the front thereof;

FIG. 3 is a top/bottom view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a front view thereof. 

CLAIM The ornamental design for a filter, as shown. 